This ticket comment has some visual history A visual history shows the evolution of an interface over time and across releases. of the h1 in wp-admin that I’d like to bubble up to here. Thanks @afercia.
h1 was used for the site name in all the admin screens, with a link back to the front page. It was removed with the refactoring of the admin bar. See how it looked in WordPress 3.0 in this screenshot.
Priori to 3.0, the header The header of your site is typically the first thing people will experience. The masthead or header art located across the top of your page is part of the look and feel of your website. It can influence a visitor’s opinion about your content and you/ your organization’s brand. It may also look different on different screen sizes. had “Visit Site” cuddled next the site name h1 to make it more discoverable. This screenshot shows WP 2.7.
More screenshots at: https://cloudup.com/cqzGvz97_zO
Site icons recently landed in trunk using the terminology “Site icon”. We didn’t go with “favicon”. Favicon is an under-the-hood term, one with a lot of tedious history. Instead, we want to package title, tagline, and icon together as site identity. And, we already have some history with site/blog icon. Here’s a quick visual survey A visual survey is a collection of screenshots for a like set of screens or interfaces, such as all list table screens or all toolbar incarnations across various devices. These screens are not presented in the context of a particular flow.https://make.wordpress.org/test/tag/visual-survey/.
4.3 Beta A pre-release of software that is given out to a large group of users to trial under real conditions. Beta versions have gone through alpha testing in-house and are generally fairly close in look, feel and function to the final product; however, design changes often occur as part of the process. uses “Site Icon”
wordpress.com An online implementation of WordPress code that lets you immediately access a new WordPress environment to publish your content. WordPress.com is a private company owned by Automattic that hosts the largest multisite in the world. This is arguably the best place to start blogging if you have never touched WordPress before. https://wordpress.com/ uses “Blog Picture/Icon”
Jetpack uses Site Icon and references favicon.